code: def _build_default_fusions(self, train=True):
      self._add_module(
          "user_vec",
          Average(
              scope="user_average",
              reuse=not train,
              module_list=[
                  self._get_module("user_vec", train=train),
                  self._get_module("user_f", train=train),
              ],
              weight=2.0,
          ),
          train=train,
      )
  
file_path: openrec/openrec/tf1/legacy/recommenders/user_pmf.py
imports: from openrec.tf1.legacy.recommenders import PMF
  from openrec.tf1.legacy.modules.extractions import MultiLayerFC
  from openrec.tf1.legacy.modules.fusions import Average
label_desc: Use image node_id 5 for calling the UserPMF obj's underlying member method code with example usage: obj._build_default_fusions(train) without return types